The watermelon ball is a type of 'fruit' ball you can train your ninja with. You can tap or swipe the watermelon, and the ninja with do special moves with it.
This is the first ball to be unlocked and bought by the player. It gives 600 XP and no coins. When the ball is thrown to him, he will catch it with his head, arms or other parts. The Watermelon Ball is a ball which is based on the fruit watermelon.
This item repairs every 10 minutes. You can repair it by waiting, paying gems or by watching an application advertisement video or tweeting on Twitter.